Commit fa1e2b74 authored by Committed by Fiona GlaserBrowse files
Transparent hugepage support
Combine frame and mb data mallocs into a single large malloc. Additionally, on Linux systems with hugepage support, ask for hugepages on large mallocs. This gives a small performance improvement (~0.2-0.9%) on systems without hugepage support, as well as a small memory footprint reduction. On recent Linux kernels with hugepage support enabled (set to madvise or always), it improves performance up to 4% at the cost of about 7-12% more memory usage on typical settings.. It may help even more on Haswell and other recent CPUs with improved 2MB page support in hardware.